SOLUTION: A total of 50 juniors & seniors were given a math test. The 35 juniors attained an average score of 80 while the 15 seniors attained an average of 70. What was the average score fo

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Question 309108: A total of 50 juniors & seniors were given a math test. The 35 juniors attained an average score of 80 while the 15 seniors attained an average of 70. What was the average score for all 50 students that took the test?
I dont understand how.. to get the answer
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A total of 50 juniors & seniors were given a math test.
The 35 juniors attained an average score of 80 while the 15 seniors attained an average of 70.
What was the average score for all 50 students that took the test?
:
Av = %28%2835%2880%29+%2B+15%2870%29%29%29%2F50